Method for producing orientational ceramic, orientational ceramic, and ceramic electronic component

Abstract

An additive that contains an emulsion binder resin substantially free of non-emulsion binder resin, such as an emulsion acrylic resin, is mixed into a ceramic raw material powder containing, as its main constituent, a perovskite-type compound to form a ceramic slurry. Then, an orientational ceramic is prepared by subjecting the slurry to a forming process while simultaneously or sequentially applying a magnetic field and drying the slurry. An orientational ceramic, even formed from a substance which has small magnetic anisotropy, such as PZT, is obtained.

What is claimed is: 
     
       1. A method for producing an orientational ceramic comprising: providing a ceramic slurry comprising an additive containing an emulsion binder resin and a ceramic raw material powder containing, as its main constituent, a composite oxide which has a perovskite-type crystalline structure, wherein the slurry is substantially free of non-emulsion binder resin; forming the ceramic slurry into a ceramic compact while applying a magnetic field; and firing the ceramic compact, thereby preparing the orientational ceramic. 
     
     
       2. The method for producing an orientational ceramic according to  claim 1 , wherein the ceramic compact is dried after applying the magnetic field. 
     
     
       3. The method for producing an orientational ceramic according to  claim 1 , wherein the ceramic compact is dried while applying the magnetic field. 
     
     
       4. The method for producing an orientational ceramic according to  claim 3 , wherein the emulsion binder resin is an emulsion acrylic resin. 
     
     
       5. The method for producing an orientational ceramic according to  claim 4 , wherein the composite oxide is a lead zirconate titanate and the applied magnetic field has a magnitude of 3 T or more. 
     
     
       6. The method for producing an orientational ceramic according to  claim 2 , wherein the emulsion binder resin is an emulsion acrylic resin. 
     
     
       7. The method for producing an orientational ceramic according to  claim 6 , wherein the composite oxide is a lead zirconate titanate and the applied magnetic field has a magnitude of 3 T or more. 
     
     
       8. The method for producing an orientational ceramic according to  claim 1 , wherein the emulsion binder resin is an emulsion acrylic resin. 
     
     
       9. The method for producing an orientational ceramic according to  claim 8 , wherein the composite oxide is a lead zirconate titanate and the applied magnetic field has a magnitude of 3 T or more. 
     
     
       10. The method for producing an orientational ceramic according to  claim 1 , wherein the composite oxide is a lead zirconate titanate. 
     
     
       11. The method for producing an orientational ceramic according to  claim 1 , wherein the ceramic compact is formed by applying the ceramic slurry onto a base material. 
     
     
       12. The method for producing an orientational ceramic according to  claim 1 , wherein the applied magnetic field has a magnitude of 3 T or more. 
     
     
       13. An orientational ceramic produced by the production method according to  claim 1 . 
     
     
       14. A ceramic electronic component comprising a ceramic sintered body comprising a ceramic layer of the orientational ceramic according to  claim 13  and an electrode layer stacked one on top of the other. 
     
     
       15. An orientational ceramic comprising a fired ceramic compact comprising a magnetic field orientated combination of an emulsion binder resin and a composite oxide which has a perovskite-type crystalline structure, and the combination being substantially free of non-emulsion binder resin. 
     
     
       16. The orientational ceramic according to  claim 13 , wherein the composite oxide is a lead zirconate titanate. 
     
     
       17. The orientational ceramic according to  claim 16 , wherein the emulsion binder resin is an emulsion acrylic resin. 
     
     
       18. A ceramic electronic component comprising a ceramic sintered body comprising a ceramic layer of the orientational ceramic according to  claim 17  and an electrode layer stacked one on top of the other. 
     
     
       19. A ceramic electronic component comprising a ceramic sintered body comprising a ceramic layer of the orientational ceramic according to  claim 16  and an electrode layer stacked one on top of the other. 
     
     
       20. A ceramic electronic component comprising a ceramic sintered body comprising a ceramic layer of the orientational ceramic according to  claim 15  and an electrode layer stacked one on top of the other.